Do you mean this model for 3 ml vials in the 32 oz thermos?
I've looked everywhere for a 3D print file for a 10 ml and 3 ml vial insert set for a 32 oz food jar. A 10 ml insert exists in public files but only one fits, leaving extra room. A 3 ml insert on top would fit for sure, and maybe even a short sideways one above that. These exist but are hard to get hold of.